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Cisco Networking Academy Connecting Networks Companion Guide: Connecting to the WAN

Chapter Description

Different technologies are used for WANs than for LANs. This chapter introduces WAN standards, technologies, and purposes. It covers selecting the appropriate WAN technologies, services, and devices to meet the changing business requirements of an evolving enterprise.

Key Terms

This chapter uses the following key terms. You can find the definitions in the glossary.

  • service provider page 38
  • digital subscriber line (DSL) page 40
  • Point-to-Point Protocol (PPP) page 45
  • Frame Relay page 45
  • Asynchronous Transfer Mode (ATM) page 45
  • High-Level Data Link Control (HDLC) page 45
  • customer premises equipment (CPE) page 46
  • data communications equipment (DCE) page 46
  • data terminal equipment (DTE) page 46
  • demarcation point page 46
  • local loop page 47
  • central office (CO) page 47
  • toll network page 47
  • dialup modem page 47
  • access server page 48
  • broadband modem page 48
  • channel service unit / data service unit (CSU/DSU) page 48
  • circuit-switched network page 48
  • Integrated Services Digital Network (ISDN) page 49
  • packet-switched network (PSN) page 50
  • virtual circuit (VC) page 50
  • private WAN infrastructure page 51
  • public WAN infrastructure page 51
  • Synchronous Optical Networking (SONET) page 52
  • Synchronous Digital Hierarchy (SDH) page 52
  • light-emitting diodes (LEDs) page 52
  • dense wavelength-division multiplexing (DWDM) page 53
  • leased lines page 54
  • Basic Rate Interface (BRI) page 57
  • Primary Rate Interface (PRI) page 57
  • Metropolitan Ethernet (MetroE) page 60
  • Ethernet over MPLS (EoMPLS) page 60
  • Virtual Private LAN Service (VPLS) page 60
  • Multiprotocol Label Switching (MPLS) page 62
  • very small aperture terminal (VSAT) page 63
  • DSL modem page 64
  • DSL access multiplexer (DSLAM) page 64
  • cable modem page 65
  • headend page 65
  • cable modem termination system (CMTS) page 65
  • municipal Wi-Fi page 66
  • WiMAX page 66
  • satellite Internet page 66
  • 3G/4G Wireless page 68
  • Long Term Evolution (LTE) page 68
  • site-to-site VPNs page 68
  • remote-access VPNs page 69
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